Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99a0c6b5c3f6df6…

MALICIOUS

PDF

76.8 KB Created: 2021-07-15 19:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 233a6598be70d805fc5c6bf5e6226802 SHA-1: 9d5eb7d9cb53efdb641a8acd9f853150269f4ea3 SHA-256: a99a0c6b5c3f6df6742133fa3dc32c6ed51b51c47e7881456f160db5dc34f7f9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URL pointing to a resource that is likely part of a phishing or malware distribution chain. Although the document body is heavily obfuscated and unreadable, the presence of the embedded URL and the ClamAV detection strongly suggest a malicious intent, likely related to phishing or directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/razvivatel/yapz/~3/kVSxLQpkboc/square?utm_term=the+best+snowman+ever
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed8abbc2ef2d11c8d7c021/1626180283810/92614352126.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec90054f2b1c51afa4b534/1626116101594/from_p7m_to.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb88.bin
0fe493e5e705d6318df94dd74e3eebafbf7089a1ef1054afc6ba8174c5234db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB88 10488 bytes
font_01_sfnt_off0000e343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE343 16792 bytes
font_02_sfnt_off0000fb55.bin
2436462ceaf776621e8743d63259cc5cf8213a916400a806b9f614e836f90304		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 17220 bytes

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